Add Synty asset packs (enemies + environment/FX/UI) via Git LFS

14 newly-imported Synty Polygon packs (~2.46 GB; FBX/PNG/textures stored in
Git LFS per .gitattributes). Enemy-grade characters: Werewolf, Kaiju,
FantasyHeroCharacters, Vikings, Western, HorrorCarnival, Dog. Environment:
Nature, NatureBiomes, PNB_Core, FantasyKingdom. UI/icons: Icons,
InterfaceCore, InterfaceSciFiSoldierHUD.

Werewolf + Kaiju back the DR-023 animated enemies; the rest are cataloged
for future work in Docs/Vault/06_Roadmap/Synty_Asset_Inventory.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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